Electrical characteristics ST1480AB - ST1480AC
6/21 DocID9101 Rev 4
4 Electrical characteristics
V
CC
= 3 V to 3.6 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred
to TA = 25 °C).
Table 6. Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
I
SUPPLY
V
CC
Power supply current
No Load, DI=0 V or
V
CC
DE=V
CC
,
RE=0 V or
V
CC
1.3 2.2 mA
DE=0 V,
RE
=0 V
1.2 1.9 mA
I
SHDN
Shutdown supply current DE=0 V, RE=V
CC
, DI=0 V or V
CC
0.002 1 µA
Table 7. Logic input electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
IL
Input logic threshold low DE, DI, RE 1.3 0.8 V
V
IH
Input logic threshold high DE, DI, RE 2 V
I
IN1
Logic input current DE, DI, RE ± 2.0 µA
I
IN2
Input current (A, B) DE=0V, V
CC
= 0 or 3.6V
V
IN
=12 V 1 mA
V
IN
=-7 V -0.8 mA
Table 8. Transmitter electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
OD
Differential drive output
R
L
= 100 Ω (RS-422) (Figure 1)2 V
R
L
= 54 Ω (RS-485) (Figure 1)1.5 V
R
L
= 60 Ω (RS-485) (Figure 3)1.5 V
ΔV
OD
Change in magnitude of driver
differential output voltage for
complementary output states
(Note: 1)
R
L
= 54 Ω or 100 Ω (Figure 1)0.2V
V
OC
Driver common mode output
voltage
R
L
= 54 Ω or 100 Ω (Figure 1)3V
ΔV
OC
Change in magnitude of driver
common mode output voltage
(Note: 1)
R
L
= 54 Ω or 100 Ω (Figure 1)0.2V
I
OSD
Driver short circuit output
current
± 250 mA
